Answer Happy

In a recent year, the scores for the reading portion of a test were normally distributed, with a mean of 20.2 and a standard deviation of 5.2. Complete parts (a) through (d) below. (a) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is less than 17. The probability of a student scoring less than 17 is (Round to four decimal places as needed.) (b) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is between 12.7 and 27.7. The probability of a student scoring between 12.7 and 27.7 is (Round to four decimal places as needed.) (c) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is more than 30.6. The probability of a student scoring more than 30.6 is (Round to four decimal places as needed.) (d) Identify any unusual events. Explain your reasoning. Choose the correct answer below. A. The event in part (a) is unusual because its probability is less than 0.05. B. None of the events are unusual because all the probabilities are greater than 0.05. C. The event in part (C) is unusual because its probability is less than 0.05. D. The events in parts (a) and (b) are unusual because its probabilities are less than 0.05.